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Re: return value CoCreateInstance not documented in MSDN George_George5-Aug-07 21:14 George_George 5-Aug-07 21:14  Thanks bob16972, I have tried to write an executable and using the same code to utilize the function from the COM component, it works! Previously, I wrote a COM (C++ unmanaged code), and use the C++ COM invokes another function from a C# COM (managed code), and it fails -- this is what I described at the beginning of this question -- "return value CoCreateInstance not documented in MSDN". Any ideas? Why exe as a client works but DLL as a client does not work? regards, George how to pass a structure as reference. [modified] uday kiran janaswamy4-Aug-07 19:49 uday kiran janaswamy 4-Aug-07 19:49  Hi all, i am facing a problem while passing a reference as structure from one class member function to another class member function. ie) i will pass a struct as input from Class A member function to Class B member function. There in Class B member function it has to fill the Structure and give me the filled structure in Class A member function. Note: this i am facing in vc++. i am having two dialog classes where i have to send this reference variable from first class member function to second Class member function. please this very very urgent for me. -- modified at 1:57 Sunday 5th August, 2007 Uday kiran Re: how to pass a structure as reference. Mark Salsbery4-Aug-07 20:54 Mark Salsbery 4-Aug-07 20:54  Can you show an example of the method declaration and how you were calling it? What exactly is the problem that's occurring? Mark Mark Salsbery Microsoft MVP - Visual C++ Re: how to pass a structure as reference. Legolas655-Aug-07 3:41 Legolas65 5-Aug-07 3:41  Either you pass the member function a pointer to the structure (&structvar), or make the receiving function accept the argument by reference (classname::member(structtype & structvar). Re: how to pass a structure as reference. uday kiran janaswamy6-Aug-07 3:05 uday kiran janaswamy 6-Aug-07 3:05  hi, Thanks a Lot I get it. Uday kiran Re: how to pass a structure as reference. bob169725-Aug-07 5:11 bob16972 5-Aug-07 5:11  /* Not dialog based but you should get what your looking for here. */ #include "stdafx.h" #include <stdio.h> typedef struct { int nKey; int nSize; } MY_STRUCTURE; class CBar { public: CBar::CBar() {} CBar::~CBar() {} void CBar::DoSomething(MY_STRUCTURE& myStructure) { // Modify the structure myStructure.nKey=45; myStructure.nSize=99; } }; class CFoo { public: CFoo() { Start(); } ~CFoo() {} void Start() { CBar bar; MY_STRUCTURE someStructure={0}; printf("BEFORE: nKey = %d, nSize = %d\n", someStructure.nKey,someStructure.nSize); bar.DoSomething(someStructure); printf("AFTER: nKey = %d, nSize = %d\n", someStructure.nKey,someStructure.nSize); } }; int main(int argc, char* argv[]) { CFoo foo; return 0; } Re: how to pass a structure as reference. uday kiran janaswamy6-Aug-07 3:03 uday kiran janaswamy 6-Aug-07 3:03  hi, Yes, i cought for this only and you have showed me path. Thanks a Lot it exaclty what the problem i facing. Uday kiran Re: how to pass a structure as reference. ThatsAlok5-Aug-07 19:51 ThatsAlok 5-Aug-07 19:51  uday kiran janaswamy wrote: Note: this i am facing in vc++. i am having two dialog classes where i have to send this reference variable from first class member function to second Class member function. But what is the problem!.. hang, value is not updated or something else! "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow cheers, Alok Gupta VC Forum Q&A :- I/ IV Support CRY- Child Relief list.remove removes all the list beriho4-Aug-07 18:25 beriho 4-Aug-07 18:25  hi all; when i invoke the method below it delets all my objects from the list, can any one please tell me what i am doing wrong? if there are 3 objects in the list and i am asking to delete the last one, it moves over all of the items but when it deletes the 3rd, it deletes them all.. thanks a lot, Beri bool cListAdv::remOneFromList ( long _unqAdvName ) { if ( ListOfAdv.size() == 0 ) { return false; // empty list } else { list<cAdv>::iterator iter ; iter = ListOfAdv.begin() ; // set the iter to the begining of the list while ( iter != ListOfAdv.end() ) // if it is not the end continue to check { cAdv tempAdv(*iter); // define a temporary adv and set it to the first object //if (ListOfAdv.size() == 1 ) iter++; // change before deleting the same object - prevent mem error iter++; if ( tempAdv.getUnqAdvName() == _unqAdvName ) { //ListOfAdv.remove( *iter ) ; // if they have the same AdvId remove - removes all objects from list ListOfAdv.remove( tempAdv ); return true; } //++iter; } return false ; // not found } } Re: list.remove removes all the list Chris Losinger5-Aug-07 10:52 Chris Losinger 5-Aug-07 10:52  does cAdv have an == operator ? lst.remove(x) deletes items from lst which match the value 'x'. image processing toolkits | batch image processing | blogging Re: list.remove removes all the list beriho5-Aug-07 19:38 beriho 5-Aug-07 19:38  yes it does, but it checks a different value; can list.erase do the job instead? May The Force Be With You... Stop list view items from being sorted Perspx4-Aug-07 11:20 Perspx 4-Aug-07 11:20  Is there a way to stop items in a list view report style from being sorted alphabetically when they are inserted using the Win32 API? Thanks for your help! --PerspX "Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates Re: Stop list view items from being sorted Mark Salsbery4-Aug-07 11:52 Mark Salsbery 4-Aug-07 11:52  Don't specify the LVS_SORTASCENDING or LVS_SORTDESCENDING when creating the control? Mark Mark Salsbery Microsoft MVP - Visual C++ Re: Stop list view items from being sorted Perspx4-Aug-07 11:53 Perspx 4-Aug-07 11:53  I havent done that.. I've just created the control with WS_VISIBLE, WS_CHILD and LVS_REPORT.. Then I've set the Extended style to LVS_EX_FULLROWSELECT --PerspX "Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates Re: Stop list view items from being sorted Mark Salsbery4-Aug-07 12:09 Mark Salsbery 4-Aug-07 12:09  Hmmm I can't reproduce that. Mark Mark Salsbery Microsoft MVP - Visual C++ Re: Stop list view items from being sorted Hamid_RT4-Aug-07 19:21 Hamid_RT 4-Aug-07 19:21  Did you make it or use of toolbox? WhiteSky Re: Stop list view items from being sorted Perspx5-Aug-07 2:15 Perspx 5-Aug-07 2:15  What do you mean? --PerspX "Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates Re: Stop list view items from being sorted Hamid_RT5-Aug-07 3:41 Hamid_RT 5-Aug-07 3:41  I wanted to know it you used of ToolBox for insert control to form set sort property to false of property window. WhiteSky Re: Stop list view items from being sorted Perspx5-Aug-07 3:29 Perspx 5-Aug-07 3:29  Thanks for your help everyone But it was my fault and I've fixed the problem --PerspX "Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates Re: Stop list view items from being sorted Hamid_RT5-Aug-07 3:53 Hamid_RT 5-Aug-07 3:53  If you said how did you solve it maybe helpful for people. WhiteSky Re: Stop list view items from being sorted Perspx5-Aug-07 4:46 Perspx 5-Aug-07 4:46  It wasn't anything to do with the control, it was merely how I inserted the items --PerspX "Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates mutex problem VC_RYK4-Aug-07 5:56 VC_RYK 4-Aug-07 5:56  Hi Guys I am creating a mutex in one application and try to open in other application but it is not opening in other application may i know what could be the reason thanks in advance RYK Re: mutex problem Mark Salsbery4-Aug-07 6:45 Mark Salsbery 4-Aug-07 6:45  Can you post the code (for both apps) relating to opening the mutex? On failure, what error code is GetLastError() returning? Mark Mark Salsbery Microsoft MVP - Visual C++ Re: mutex problem VC_RYK4-Aug-07 7:12 VC_RYK 4-Aug-07 7:12  Hi This is the code what i have used for creating mutex and opening mutex SECURITY_ATTRIBUTES SecAtt; SecAtt.nLength = sizeof(SECURITY_ATTRIBUTES); SecAtt.bInheritHandle = true; SecAtt.lpSecurityDescriptor = NULL; m_hMutex = CreateMutex(&SecAtt ,FALSE,_T("Global\\DeviceFilterWriteNotification")); in a Function the same application i have written some pice of code ::WaitForSingleObject(m_hMutex ,INFINITE); // some percess is executing if(ReleaseMutex(m_hMutex)) //allows ervice to access status file WriteLog("Write Mutex Reset Successfully"); else WriteLog("Failed to Release write Mutex"); in other application which is a service i am opening the Mutex by this way HANDLE hWrite= OpenMutex(NULL,FALSE,_T("Global\\DeviceFilterWriteNotification")); ReleaseMutex(hWrite); Thanks in advance RYK Re: mutex problem Mark Salsbery4-Aug-07 8:32 Mark Salsbery 4-Aug-07 8:32  What happens if you specify access flags: HANDLE hWrite= OpenMutex(MUTEX_ALL_ACCESS, FALSE, _T("Global\\DeviceFilterWriteNotification")); If that fails, what is the error code? Also, after OpenMutex(), the thread doesn't own the mutex so there's no need to release it. Mark Mark Salsbery Microsoft MVP - Visual C++

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